General relativistic effects in the neutrino-driven wind and r-process nucleosynthesis

Christian Y. Cardall; George M. Fuller

doi:10.1086/310838

General relativistic effects in the neutrino-driven wind and r-process nucleosynthesis

Christian Y. Cardall, George M. Fuller

Research output: Contribution to journal › Article › peer-review

85 Scopus citations

Abstract

We discuss general relativistic effects in the steady state neutrino-driven "wind" that may arise from nascent neutron stars. In particular, we generalize previous analytic estimates of the entropy per baryon S, the mass outflow rate M, and the dynamical expansion timescale τ_dyn. We show that S increases and τ_dyn decreases with increasing values of the mass-to-radius ratio describing the supernova core. Both of these trends indicate that a more compact core will lead to a higher number of neutrons per seed nucleus. Such an enhancement in the neutron/seed ratio may be required for successful r-process nucleosynthesis in neutrino-heated supernova ejecta.

Original language	English
Pages (from-to)	L111-L114
Journal	Astrophysical Journal
Volume	486
Issue number	2 PART II
DOIs	https://doi.org/10.1086/310838
State	Published - 1997
Externally published	Yes

Funding

We wish to thank Y.-Z. Qian and J. R. Wilson for helpful discussions. This work was supported by grants NSF PHY95-03384 and NASA NAG5-3062 at UCSD.

Funders	Funder number
National Science Foundation	PHY95-03384
National Aeronautics and Space Administration	NAG5-3062

Keywords

Equation of state
Nuclear reactions, nucleosynthesis, abundances
Relativity -supernovae: general

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10.1086/310838

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AU - Fuller, George M.

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AB - We discuss general relativistic effects in the steady state neutrino-driven "wind" that may arise from nascent neutron stars. In particular, we generalize previous analytic estimates of the entropy per baryon S, the mass outflow rate M, and the dynamical expansion timescale τdyn. We show that S increases and τdyn decreases with increasing values of the mass-to-radius ratio describing the supernova core. Both of these trends indicate that a more compact core will lead to a higher number of neutrons per seed nucleus. Such an enhancement in the neutron/seed ratio may be required for successful r-process nucleosynthesis in neutrino-heated supernova ejecta.

KW - Equation of state

KW - Nuclear reactions, nucleosynthesis, abundances

KW - Relativity -supernovae: general

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VL - 486

SP - L111-L114

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2 PART II

ER -

General relativistic effects in the neutrino-driven wind and r-process nucleosynthesis

Abstract

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Keywords

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